This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A048494 #6 Mar 30 2012 18:56:55
%S A048494 1,2,1,5,2,1,13,6,2,1,33,18,7,2,1,81,50,23,8,2,1,193,130,67,28,9,2,1,
%T A048494 449,322,179,84,33,10,2,1,1025,770,451,228,101,38,11,2,1,2305,1794,
%U A048494 1091,580,277,118,43,12,2,1,5121,4098,2563,1412,709
%N A048494 Array T(k,n) read by antidiagonals: T(n,k) = 2^(n-1) * ((k+1)*n - 2k) + k + 1.
%C A048494 n-th difference of (T(k,n),T(k,n-1),...,T(k,0)) is 1+(n-1)*(k+1), for n=1,2,3,...; k=0,1,2,...
%e A048494 Diagonals: {1}; {2,1}; {5,2,1}; ...
%Y A048494 Row 1 = (1, 2, 5, 13, 33, ...) = A005183.
%K A048494 nonn,tabl
%O A048494 0,2
%A A048494 _Clark Kimberling_
%E A048494 Formula from _Ralf Stephan_, Jan 15 2004